Refrigerating apparatus



Jan. 11, W38. J. KARMAZIN REFRIGERATING APPARATUS Filed May 51, 1935INVENTOR. J N/ KA W/Z/A/ ATTORNEY.

Patented Jan. 11, 1938 UNITED STATE- REFRIGERATING ArrAnA'rus JohnKarmazin, Huntington,

Ind., assignor to Karmazin Engineering Company, a corporation ofMichigan Application May 31, 1935, Serial No. 24,271

. 4 Claims.

This invention relates to refrigerating apparatus and more particularlyto a-\ combined condenser and receiver for use in refrigeratingapparatus. 4

It is an object of the invention to provide a combined condenser andreceiver which may be economically constructed and which is arranged toform a compact assembly by which the space required for the condenserand receiver ordinarily employed may be reduced.

It is also an object to provide a combined condenser and receiverwherein a receiver portion is mounted vertically along side thecondenser portion and is connected thereto in a manner to storecondensed refrigerant to a level above the bottom of the heat exchangeportion without flooding the heat exchange portion.

Further objects and advantages of the present invention will be apparentfrom the following description, reference being had to theaccompanying'drawing wherein a preferred form of the present inventionis clearly shown.

In the drawing:

Fig. 1 is a side view partly in cross section of a combined condenserand receiver embodying the present invention and showingdiagrammatically the principal elements of a complete refrigeratingsystem;

Fig. 2 is a cross sectionon line 2-2 of Fig. 1; and 1 Fig. 3 is a topview partially inv section of the combined condenser and receiver.

Referring now to Fig. 1, there is illustrated a refrigerating apparatuscomprising a compressor l0 driven by a motor l2 for deliveringcompressed refrigerant through a conduit Hi to a combined condenser andreceiver l6. Refrigerant liquefied in the condenser-receiver I 6 isdelivered through aconduit l8 to an evaporator 28. The evaporatedrefrigerant is withdrawn through a conduit 22 to the compressor Illforrecompression. Suitable automatic control means comprising a lowpressure control switch 24' are provided for intermittently operatingthe motor I2 in accordance with the temperature conditions at theevaporator 28.

The combined condenser and receiver i 6 is formed from a plurality ofsheet metal fins 26 each of which is formed with an integral taperedtubular projection 28.0f cylindrical form and a plurality of taperedtubular projections 30 of oval form as illustrated in Fig. 3. Thebottoms of the tubular projections 28 are perforated centrally and atdiametrically opposed pointsadjacent the side walls thereof asillustrated at 32.

The bottoms of the tubular projections 36 are alternately perforatedcentrally as at 34 in Fig. 3 and perforated near the ends at 36 as shownin Fig. 3. A plurality of such fins are stacked together in the mannerillustrated in Fig. 1 so that the projections are telescoped together,the projections 28 providing a cylindrical receiver chamber and theprojections 30 providing a plurality of condensing tubes. An inletheader 38 comprising a trough-like stamping 40 having an inletconnection 42 and a plate 44 having tapered tubular projections 46 and aperipheral clamping member 48 for clamping the member 40 to the plate 44is attached to the upper-most fin 26 by telescoping the projections 46into the projections 30 of that fin. A similarly formed bottom header 50is secured to the bottom fin 26 so that the headers 48 and 58 togetherwith the condensing tubes formed by the projections 38 provide arefrigerant flow circuit through the condensing portion of the device.The bottom of the projection 28 of the lower-most plate is enclosed by acup-like header member 52 having an opening 54 therein. A conduit 56leads from the header 50 through the opening 54 and into the receiverchamber 58 near the top thereof, the tube 56 passing upwardly throughthe perforations 32 in the plates 26. An upper closure member or header60 is telescoped into the projection. 28 of the top-most fin and carriesa liquid refrigerant outlet connection 62 and a downwardly passesthrough the perthe condensing tubes the latent heat of vaporization isdissipated to the airthrough the fins 26 and liquefied refrigerant iscollected in the header 58. From the header 58 the liquid refrigerantpasses through the tube 56 to the upper portion of the chamber 58 whereit spills over into the chamber 58 and is stored therein. Liquidrefrigerant is withdrawn from the chamber 58 as required through thetube 64. It will thus be seen that the present invention provides acombined condenser and receiver in which the cost of the receiver isrepresented only by the additional material which is added to the finsabove that required for the construction of the condenser portion plusthe slight cost for the somewhat more complicated dies necessary toproduce the receiver portion. A substantial saving results from the factthat the receiver is fabricated simultaneously with the fabrication ofthe condenser portion, thus eliminating a considerable item of laborcost.

I claim:

1. A combined condenser and receiver for refrigerating apparatuscomprising in combination a plurality of similar fins stacked insuperposed 'relation, each of said fins including an integrally formedtapered tubular projection, said fins being assembled with theprojections in telescoping engagement to form a chamber, means forming aplurality of condenser tubes passing through said fins in heat exchangerelation therewith and spaced from each other and from said projections,conduit forming means connecting the ends of said tubes in a refrigerantflow circuit in communication with said chamber, inlet means foradmitting refrigerant to said tubes, and outlet means for withdrawingrefrigerant from said chamber.

2. A combined condenser and receiver for refrigerating apparatuscomprising in combination a plurality of similar fins stacked insuperposed relation, each of said fins including an integrally formedtapered tubular projection, said fins being. assembled with theprojections in telescoping engagement to form a chamber, other integraltapered tubular projections forming a plurality of condenser tubespassing through said fins in heat exchange relation therewith and spacedfrom each other and from said first projections, conduit forming meansconnecting the ends of said tubes in a refrigerant flow circuit incommunication with said chamber, inlet means for admitting refrigerantto said tubes, and outlet means for withdrawing refrigerant from saidchamber.

3. A combined condenser and receiver for refrigerating apparatuscomprising a vertically disposed chamber, a plurality of verticalcondensing tubes, a plurality of horizontal flns extending across saidtubes and said chamber, header means for connecting the ends of saidtubes in a refrigerant flow circuit and for closing the ends of saidchamber and including means for conducting refrigerant first throughsaid tubes and then into said chamber. 1

4. A combined condenser and receiver for refrigerating apparatuscomprising a vertically disposed chamber, a plurality of verticalcondensing tubes, a plurality of horizontal fins extending across saidtubes and said chamber, header means for connecting the ends of saidtubes in a refrigerant flow circuit and for closing the ends of saidchamber and including means for conducting refrigerant first throughsaid tubes and then into said chamber, and means for preventing reverseflow of liquid refrigerant from said chamber when the liquid leveltherein is above the level of thebottom of said tubes.

JOHN KARMAZIN.

